S.C. Code Ann. § 38-69-245
(C) The minimum nonforfeiture amount at any time at or before the commencement of an annuity payment is equal to an accumulation up to that time at a rate of interest as indicated in subsection (E) of the net considerations paid before that time, decreased by the sum of items of (1) through (4):
(E)
(1) The interest rate used in determining minimum nonforfeiture amounts must be an annual rate of interest determined as the lesser of three percent a year and the following, which must be specified in the contract if the interest rate is reset: